package com.Industrial.control;

import cn.hutool.core.io.BufferUtil;
import cn.hutool.core.lang.Console;
import cn.hutool.core.util.StrUtil;
import cn.hutool.socket.nio.NioClient;

import java.nio.ByteBuffer;
import java.util.Scanner;


public class Client {
    public static void main(String[] args) {
        NioClient client = new NioClient("127.0.0.1", 8080);
        client.setChannelHandler((sc) -> {
            ByteBuffer readBuffer = ByteBuffer.allocate(1024);
            //从channel读数据到缓冲区
            int readBytes = sc.read(readBuffer);
            if (readBytes > 0) {
                //Flips this buffer.  The limit is set to the current position and then
                // the position is set to zero，就是表示要从起始位置开始读取数据
                readBuffer.flip();
                //returns the number of elements between the current position and the  limit.
                // 要读取的字节长度
                byte[] bytes = new byte[readBuffer.remaining()];
                //将缓冲区的数据读到bytes数组
                readBuffer.get(bytes);
                String body = StrUtil.utf8Str(bytes);
                Console.log("[{}]: {}", sc.getRemoteAddress(), body);
            } else if (readBytes < 0) {
                sc.close();
            }
        });
        client.listen();
        // 在控制台向服务器端发送数据
        Console.log("请输入发送的消息：");
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextLine()) {
            String request = scanner.nextLine();
            if (request != null && request.trim().length() > 0) {
                client.write(BufferUtil.createUtf8(request));
            }
        }

    }
}
